AC Repair — Bay Area
When your AC stops working in a Bay Area summer, you need a licensed technician fast — not a call center. AD Mechanical dispatches C-20 licensed HVAC technicians same-day when available, and we diagnose the root cause before recommending any repair.
Common Reasons Customers Call Us
- AC not cooling — blowing warm or room-temperature air
- System short-cycling — turning on and off frequently
- Ice forming on the indoor unit or refrigerant lines
- Loud banging, rattling, squealing, or grinding noises
- Water leaking from the air handler or indoor unit
- Thermostat set to cool but system doesn't respond
- High electricity bills with no comfort change
- Uneven cooling — some rooms cold, others warm
What Our AC Repair Includes
Every call starts with a full diagnostic — not a guess. We check refrigerant levels, electrical components, capacitors, contactors, blower motors, condenser fan motors, coils, drain lines, and thermostat operation. You get a clear explanation of what we found and what it costs before we touch anything.
- Full system diagnostic including electrical and refrigerant checks
- Capacitor and contactor inspection and replacement
- Refrigerant leak detection and recharge (EPA 608 certified)
- Condenser and evaporator coil inspection and cleaning
- Blower motor and condenser fan motor testing
- Condensate drain clearing and treatment
- Thermostat and control board diagnosis
- Upfront written quote before any repair work begins
Repair vs. Replacement — Honest Advice
If your system is over 12–15 years old, uses R-22 refrigerant (now phased out), or the repair cost exceeds roughly half the cost of a new unit, replacement is often the smarter financial decision. We give you both options with real numbers — no pressure, no upselling.
Signs replacement may make more sense: compressor failure on an older unit, multiple failures in one season, R-22 systems with refrigerant leaks, or efficiency below 10 SEER on a system running constantly.
San Jose, Santa Clara, Sunnyvale, Mountain View, Palo Alto, Redwood City, San Mateo, Burlingame, Millbrae, San Bruno, South San Francisco, Daly City, San Francisco, and nearby Bay Area cities